Electronics Forum | Mon Sep 12 03:38:03 EDT 2016 | rob
Hi John, We picked up a used laser marker (Asys ALS03) last year for around 30K euros and it has done approx 2M codes (we use 6mm square QR) in the last year without fault - it reads them all back to confirm which is handy. We also use labels, and
Electronics Forum | Mon Jan 30 05:58:39 EST 2017 | rob
Hi all, > > Am new to SMT here. > > I have a very > thin laminate substrate which around 120um > thickess. Being that thin, warpage is constantly > an issue for us. > > For the solder printing part, > we have a number of problems. > > Being s
Electronics Forum | Fri Sep 09 11:01:14 EDT 2005 | rob
If the tombstoning is thermal (occuring during reflow) then try slightly reducing the stencil apertures so there is less the paste on the pads, reducing the forces acting on the component. Also take a look at the cooldown profile & making it more
Electronics Forum | Tue Oct 14 07:30:00 EDT 2014 | rob
For low voltage and current applications there are also some nice SMT conductive foam pads that come in on tape. http://www.gore.com/MungoBlobs/621/772/SMT_Grounding_Pads.pdf I think Laird also do something similar. We place them with no problem.
Electronics Forum | Mon Oct 13 08:43:56 EDT 2014 | rob
Hi Larry, Picture a old lady with a set of knitting needles with leads attached to them, pressing the needles into different points of the PCB (pads, test points or component leads) and measuring resistance, inductance, waveforms etc between these p
Electronics Forum | Wed Oct 15 03:59:00 EDT 2014 | rob
Are you using specific tooling for each part, or just generic? If so it could be pushing down at an angle and slightly tearing the PCB. We use the same style press as you but make custom fixtures to fit each connector and hold each PCB tight.
Electronics Forum | Mon Jul 25 03:39:25 EDT 2016 | rob
A 200% + increase in load time certainly erases > any thoughts of efficiency in my mind. We have tried the Visker Electric feeders out (Yamaha & Juki)and they are nice and smooth, with a faster recovery rate, also adjustable pitch. However, with
Electronics Forum | Wed Feb 01 02:21:26 EST 2017 | rob
80 micrometres (0.08mm) or 80 mil (2mm)? Smallest I've seen reliably printed is around 0.2mm x 0.4mm (01005 pad) and 0.2mm x 0.2mm CSP pad, not seen anything dispensed below 0.35ish, but we are not cutting edge.
Electronics Forum | Wed Feb 01 03:17:10 EST 2017 | rob
Ok, that's small - I think you may need a special semi-conductor printer for this - positional accuracy on a "normal" SMT printer is no more than 20 micrometres from memory. In my semiconductror fab days we were printing with a positional accuracy
Electronics Forum | Wed Feb 01 02:30:12 EST 2017 | rob
Usually it's the motor start caps blowing on the motors - take one off a failed motor and check the type strapped to the side - our older ones use these: http://hk.element14.com/genteq/27l571/capacitor-polypropylene-pp-film/dp/1735893?ost=27L571&se
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